CN110581467A

CN110581467A - Locking structure, electrical connection box and wire harness

Info

Publication number: CN110581467A
Application number: CN201910490424.3A
Authority: CN
Inventors: 川村幸宽
Original assignee: Yazaki Corp
Current assignee: Yazaki Corp
Priority date: 2018-06-07
Filing date: 2019-06-06
Publication date: 2019-12-17
Anticipated expiration: 2039-06-06
Also published as: JP2019213393A; EP3578422B1; US10608422B2; JP7083701B2; US20190379194A1; CN110581467B; EP3578422A1

Abstract

The present invention suppresses the immersion of liquid. The engaged body of the lock structure includes: a liquid discharge space portion surrounded by inner wall surfaces of the 1 st and 2 nd engaging wall portions and the 3 rd and 4 th engaged wall portions which are disposed to face each other with a space therebetween; a 2 nd engaged wall portion protruding from an outer wall surface of the engaged projection portion; a 1 st communication port for communicating the liquid discharge space portion with the outside on the insertion direction side of the engaged protrusion portion; and a 2 nd communication port which communicates the liquid discharge space portion with the outside on the side of the 1 st communication port in the pull-out direction, the engaging body including: a housing space which is an internal space surrounded by inner wall surfaces of the 1 st and 2 nd engaging wall portions and the 3 rd and 4 th engaging wall portions which are arranged to face each other with a space therebetween, and which houses the engaged members; an insertion hole for inserting the engaged body into the accommodation space; a locking hole provided in the 2 nd engaging wall portion, into which the engaged protrusion is inserted; and a communication hole for communicating the housing space with the outside on the side closer to the insertion direction than the locking hole.

Description

Locking structure, electrical connection box and wire harness

Technical Field

The invention relates to a lock structure, an electrical connection box, and a wire harness.

Background

Conventionally, a lock structure for maintaining an assembled state between 2 members to be assembled is known (patent document 1 and patent document 2 described below). The locking structure is applied to, for example, an electrical connection box that accommodates an electronic component or an electrical connection box that accommodates an electronic component and an electric wire and constitutes a wire harness together with the electric wire pulled out to the outside, or the like. In the electrical connection box, 2 fitting members for fitting the peripheral edge portions of the openings to each other are provided as constituent members of the housing. In the electrical connection box, a locking structure for maintaining the fitting state of the 2 fitting parts is used. The locking structure includes an engaged body provided to one of the 2 fitting members and an engaging body provided to the other of the 2 fitting members. When the 2 fitting members are fitted, the 2 fitting members are kept in a fitted state by the locking structure engaging the engaged body and the engaging body with each other.

Documents of the prior art

Patent document

patent document 1: japanese patent laid-open publication No. 2016 + 25802

Patent document 2: japanese patent laid-open No. 2014-108038

Disclosure of Invention

Technical problem to be solved by the invention

However, in the electrical connection box, various measures are taken to prevent liquid such as water from entering the inside of the housing. This countermeasure is not only applied to the fitting portion of the 2 fitting members, but also applied to the lock structure if the gap between the engaged body and the engaging body communicates with the inside of the housing. Accordingly, the lock structure is preferably capable of suppressing liquid from entering into a gap between the engaged body and the engaging body, and the like, and also suppressing liquid from entering into the inside of the housing through the gap and the like.

Accordingly, an object of the present invention is to provide a lock structure, an electrical connection box, and a wire harness that can suppress liquid intrusion.

Means for solving the problems

In order to achieve the above object, a lock structure according to the present invention includes: a stuck body; and a engaging body which is capable of inserting and removing the engaged body in mutually opposite insertion and removal directions and which is capable of engaging the inserted engaged body in the insertion direction and the removal direction, respectively. Further, the engaged body includes: a 1 st wall to be engaged and a 2 nd wall to be engaged, the 1 st wall to be engaged and the 2 nd wall to be engaged being disposed opposite to each other with a gap therebetween in a direction orthogonal to the insertion and extraction direction; a 3 rd engaged wall portion and a 4 th engaged wall portion, the 3 rd engaged wall portion and the 4 th engaged wall portion being disposed to face each other with a gap therebetween in a direction orthogonal to the insertion/removal direction and a facing direction of the 1 st engaged wall portion and the 2 nd engaged wall portion; a liquid discharge space portion surrounded by inner wall surfaces of the 1 st to 4 th engaging wall portions; an engaged protruding portion protruding from an outer wall surface of the 2 nd engaged wall portion; a 1 st communication port that communicates the liquid discharge space portion with the outside on the insertion direction side with respect to the engagement protruding portion; and a 2 nd communication port, the 2 nd communication port communicating the liquid discharge space portion with the outside on the side of the extraction direction with respect to the 1 st communication port, the engaging member including: a 1 st engaging wall portion and a 2 nd engaging wall portion, the 1 st engaging wall portion and the 2 nd engaging wall portion being disposed opposite to each other with a gap therebetween in the opposing direction; a 3 rd engaging wall portion and a 4 th engaging wall portion, the 3 rd engaging wall portion and the 4 th engaging wall portion being disposed to face each other with a gap therebetween in a direction orthogonal to the insertion/removal direction and the facing direction; an accommodating space which is an internal space surrounded by inner wall surfaces of the 1 st to 4 th engaging wall portions, and accommodates the engaged body; an insertion opening through which the engaged body is inserted into the accommodating space from a front end of an end portion on the insertion direction side; a locking hole which is a through hole provided in the 2 nd engaging wall portion and into which the engaged protrusion is inserted when the engaged body is accommodated in the accommodating space; and a communication port that communicates the accommodation space with the outside on the insertion direction side of the locking hole.

For example, the locking hole is a through hole connected to the communication port.

Here, it is preferable that the 1 st communication port and the 2 nd communication port are arranged to face each other in the insertion/removal direction.

Preferably, the engaged body is provided on an outer wall surface side of a peripheral wall portion of the 1 st fitting member, and the 1 st engaged wall portion is formed by a part of the peripheral wall portion of the 1 st fitting member, the engaged body is provided on the 1 st peripheral wall portion and the 2 nd peripheral wall portion of the 2 nd fitting member sandwiching an opening peripheral portion of the peripheral wall portion of the 1 st fitting member, and the 1 st engaging wall portion is formed by a part of the 1 st peripheral wall portion having an opening peripheral portion disposed to face an inner wall surface of the opening peripheral portion of the peripheral wall portion, and the 2 nd engaging wall portion is formed by a part of the 2 nd peripheral wall portion having an opening peripheral portion disposed to face an outer wall surface of the opening peripheral portion of the peripheral wall portion.

In order to achieve the above object, an electrical connection box according to the present invention includes a housing for accommodating an electronic component therein, the housing including at least a 1 st fitting member and a 2 nd fitting member fitted to each other, and a lock structure for maintaining a fitted state of the 1 st fitting member and the 2 nd fitting member, the lock structure including: an engaged body provided in the 1 st fitting member; and a engaging body provided to the 2 nd fitting member, the engaging body being capable of inserting and removing the engaged body in mutually opposite insertion and removal directions, and of engaging the inserted engaged body in the insertion direction and the removal direction, respectively. Further, the engaged body includes: a 1 st wall to be engaged and a 2 nd wall to be engaged, the 1 st wall to be engaged and the 2 nd wall to be engaged being disposed opposite to each other with a gap therebetween in a direction orthogonal to the insertion and extraction direction; a 3 rd engaged wall portion and a 4 th engaged wall portion, the 3 rd engaged wall portion and the 4 th engaged wall portion being disposed to face each other with a gap therebetween in a direction orthogonal to the insertion/removal direction and a facing direction of the 1 st engaged wall portion and the 2 nd engaged wall portion; a liquid discharge space portion surrounded by inner wall surfaces of the 1 st to 4 th engaged wall portions; an engaged protruding portion protruding from an outer wall surface of the 2 nd engaged wall portion; a 1 st communication port that communicates the liquid discharge space portion with the outside on the insertion direction side with respect to the engagement protruding portion; and a 2 nd communication port, the 2 nd communication port communicating the liquid discharge space portion with the outside on the side of the extraction direction with respect to the 1 st communication port, the engaging member including: a 1 st engaging wall portion and a 2 nd engaging wall portion, the 1 st engaging wall portion and the 2 nd engaging wall portion being disposed opposite to each other with a gap therebetween in the opposing direction; a 3 rd engaging wall portion and a 4 th engaging wall portion, the 3 rd engaging wall portion and the 4 th engaging wall portion being disposed to face each other with a gap therebetween in a direction orthogonal to the insertion/removal direction and the facing direction; an accommodating space which is an internal space surrounded by inner wall surfaces of the 1 st to 4 th engaging wall portions, and accommodates the engaged body; an insertion opening through which the engaged body is inserted into the accommodating space from a front end of an end portion on the insertion direction side; a locking hole which is a through hole provided in the 2 nd engaging wall portion and into which the engaged protrusion is inserted when the engaged body is accommodated in the accommodating space; and a communication port that communicates the accommodation space with the outside on the insertion direction side of the locking hole.

in order to achieve the above object, a wire harness according to the present invention includes: an electronic component; an electric wire electrically connected with respect to the electronic component; and a housing that accommodates the electronic component and the electric wire inside and that draws out the electric wire from inside to outside, the housing having at least a 1 st fitting member and a 2 nd fitting member that are fitted to each other and having a lock structure that maintains a fitted state of the 1 st fitting member and the 2 nd fitting member, the lock structure including: an engaged body provided in the 1 st fitting member; and a engaging body provided to the 2 nd fitting member, the engaging body being capable of inserting and removing the engaged body in mutually opposite insertion and removal directions, and of engaging the inserted engaged body in the insertion direction and the removal direction, respectively. Further, the engaged body includes: a 1 st wall to be engaged and a 2 nd wall to be engaged, the 1 st wall to be engaged and the 2 nd wall to be engaged being disposed opposite to each other with a gap therebetween in a direction orthogonal to the insertion and extraction direction; a 3 rd engaged wall portion and a 4 th engaged wall portion, the 3 rd engaged wall portion and the 4 th engaged wall portion being disposed to face each other with a gap therebetween in a direction orthogonal to the insertion/removal direction and a facing direction of the 1 st engaged wall portion and the 2 nd engaged wall portion; a liquid discharge space portion surrounded by inner wall surfaces of the 1 st to 4 th engaged wall portions; an engaged protruding portion protruding from an outer wall surface of the 2 nd engaged wall portion; a 1 st communication port that communicates the liquid discharge space portion with the outside on the insertion direction side with respect to the engagement protruding portion; and a 2 nd communication port, the 2 nd communication port communicating the liquid discharge space portion with the outside on the side of the extraction direction with respect to the 1 st communication port, the engaging member including: a 1 st engaging wall portion and a 2 nd engaging wall portion, the 1 st engaging wall portion and the 2 nd engaging wall portion being disposed opposite to each other with a gap therebetween in the opposing direction; a 3 rd engaging wall portion and a 4 th engaging wall portion, the 3 rd engaging wall portion and the 4 th engaging wall portion being disposed to face each other with a gap therebetween in a direction orthogonal to the insertion/removal direction and the facing direction; an accommodating space which is an internal space surrounded by inner wall surfaces of the 1 st to 4 th engaging wall portions, and accommodates the engaged body; an insertion opening through which the engaged body is inserted into the accommodating space from a front end of an end portion on the insertion direction side; a locking hole which is a through hole provided in the 2 nd engaging wall portion and into which the engaged protrusion is inserted when the engaged body is accommodated in the accommodating space; and a communication port that communicates the accommodation space with the outside on the insertion direction side of the locking hole.

Effects of the invention

in the locking structure according to the present invention, even if liquid enters the housing space from the communication port, the locking hole, or the like, and the liquid having entered the housing space is guided to the end portion on the insertion direction side of the engaged body, the liquid can be introduced into the liquid discharge space portion from the 1 st communication port and discharged to the outside from the 2 nd communication port. Therefore, since it is possible to suppress the liquid from entering into the gap between the engaged body and the engaging body connected to the internal spaces of the 1 st fitting member and the 2 nd fitting member, the lock structure can suppress the liquid from flowing into the internal spaces of the 1 st fitting member and the 2 nd fitting member through the gap. Further, the electric connection box and the wire harness according to the present invention have the lock structure, and can obtain the same effects as the lock structure.

Drawings

Fig. 1 is a perspective view showing a state before engagement of the lock structure of the embodiment.

fig. 2 is a front view showing a state before engagement of the lock structure of the embodiment.

Fig. 3 is a perspective view showing a state after engagement of the lock structure of the embodiment.

Fig. 4 is a front view showing a state after engagement of the lock structure of the embodiment.

Fig. 5 is a cross-sectional view taken along line X-X of fig. 2.

Fig. 6 is a cross-sectional view taken along line X-X of fig. 4.

Fig. 7 is a diagram illustrating an example of a path of the liquid.

Fig. 8 is a diagram illustrating an example of a path of the liquid.

Fig. 9 is a diagram illustrating an example of a path of the liquid.

Fig. 10 is a diagram illustrating an example of a path of the liquid.

Fig. 11 is a cross-sectional view taken along line Y1-Y1 in fig. 4, illustrating an example of a path of liquid.

Fig. 12 is a cross-sectional view taken along line Y2-Y2 in fig. 4, and illustrates an example of a path of liquid.

fig. 13 is a perspective view showing an electric connection box to which the lock structure of the embodiment is applied and a wire harness.

fig. 14 is an exploded perspective view of a housing of the electrical junction box.

Fig. 15 is an exploded perspective view of the housing of the electrical junction box viewed from another angle.

Description of the symbols

1 locking structure

10 is engaged part

11 are engaged with main body

11a end portion

11a₁Front end

12 are engaged with the protruding part

131 st engaged wall part

14 nd 2 th engaged wall part

14a outer wall surface

15 No. 3 engaged wall part

16 th locked wall part

17 liquid discharge space part

17a 1 st communication port

17b 2 nd communication port

20 engaging body

23 st 1 engaging wall part

24 nd 2 nd engaging wall part

24a locking hole

25 rd 3 engagement wall part

26 th 4 engagement wall part

27 accommodating space

27a insertion port

27b communication port

100 electric connection box

110 frame body

120 st fitting part

121 peripheral wall body

121a opening peripheral edge portion

130 nd 2 fitting member

131 st wall body

131c opening peripheral edge portion

132 nd 2 nd peripheral wall body

132c opening peripheral edge portion

150 st locking structure

We electric wire

WH wire harness

Detailed Description

Embodiments of a lock structure, an electrical connection box, and a wire harness according to the present invention will be described below in detail with reference to the drawings. The present invention is not limited to the embodiment.

[ embodiment ]

One embodiment of a lock structure, an electrical connection box, and a wire harness according to the present invention will be described with reference to fig. 1 to 15.

Reference numeral 1 in fig. 1 to 6 denotes a lock structure of the present embodiment for holding 2 fitting members in a fitted state. These two fitting members are members for constituting the housing 110 as described later, for example. The lock structure 1 includes: the engaged body 10; and an engaging body 20 that can insert and remove the engaged body 10 in the insertion and removal directions opposite to each other, and that can engage the inserted engaged body 10 in the insertion direction and the removal direction, respectively. The engaged body 1 and the engaging body 20 are molded from an insulating material such as a synthetic resin. In the lock structure 1, the engaged body 10 is provided on one fitting member, and the engaging body 20 is provided on the other fitting member. In addition, hereinafter, in the case of being abbreviated as the insertion direction or the extraction direction, the insertion direction or the extraction direction of the engaged body 10 with respect to the engaged body 20 is indicated.

The engaged body 10 includes: a main body (hereinafter, referred to as "engaged main body") 11 that can be inserted into and removed from the engaging body 20; and a protruding portion (hereinafter, referred to as "engaged protruding portion") 12 protruding from an outer wall surface of the engaged body 11 (fig. 1 to 6).

The engaged body 11 of this example has: a first wall portion 13 and a 2 nd wall portion 14 (hereinafter, referred to as "1 st engaged wall portion and 2 nd engaged wall portion") which are disposed facing each other with a gap therebetween in a direction orthogonal to the insertion/extraction direction; and a 3 rd wall portion 15 and a 4 th wall portion 16 (hereinafter referred to as "3 rd engaged wall portion and 4 th engaged wall portion") which are disposed facing each other with a gap therebetween in a direction (hereinafter referred to as "width direction") orthogonal to the insertion and extraction direction and the facing direction of the 1 st engaged wall portion 13 and the 2 nd engaged wall portion 14 (fig. 1 and 2). In the following description, the facing direction will be referred to simply as the facing direction, and the facing direction of the 1 st engaged wall portion 13 and the 2 nd engaged wall portion 14 will be referred to as the same direction.

The 1 st to-be-engaged wall portion 13 and the 2 nd to-be-engaged wall portion 14 in this example are formed in a rectangular flat plate shape. In this example, the 2 nd engaged wall portion 14 is formed to have a length in the insertion/extraction direction shorter than the 1 st engaged wall portion 13. In this example, the 3 rd engaged wall portion 15 is provided as a connecting wall portion that connects one end portion in the width direction of the 1 st engaged wall portion 13 and the 2 nd engaged wall portion 14, and the 4 th engaged wall portion 16 is provided as a connecting wall portion that connects the other end portion in the width direction of the 1 st engaged wall portion 13 and the 2 nd engaged wall portion 14. That is, the engaged body 11 of this example is formed in a square tube shape by the 1 st to 4 th engaged wall portions 13 to 16. Thus, the engaged body 11 has a rectangular parallelepiped space 17 (fig. 1 to 6) surrounded by the inner wall surfaces of the 1 st to 4 th engaged wall portions 13 to 16 (hereinafter referred to as a "drainage space"). In this example, a portion between the end surface on the insertion direction side and the end surface on the extraction direction side of the 2 nd engaged wall portion 14 is defined as a drainage space portion 17.

In addition, the engaged body 11 of this example has: a 1 st communication hole 17a which communicates the drain space portion 17 with the outside on the insertion direction side of the engaged protrusion 12; and a 2 nd communication port 17b that communicates the liquid discharge space 17 with the outside on the side of the 1 st communication port 17a in the drawing direction (fig. 1, 2, 5, and 6). In this example, the end of the liquid discharge space 17 on the insertion direction side is defined as the 1 st communication port 17a, and the end of the liquid discharge space 17 on the extraction direction side is defined as the 2 nd communication port 17 b. That is, in the engaged body 11, the 1 st communication port 17a and the 2 nd communication port 17b are arranged to face each other in the insertion/removal direction so that the 1 st communication port 17a is opened in the insertion direction and the 2 nd communication port 17b is opened in the extraction direction. Therefore, in the engaged body 11, the drain space portion 17 can be formed by punching of a forming die for forming a gap between the 1 st engaged wall portion 13 and the below-described piece portion 14 c. The 1 st and 2 nd communication ports 17a and 17b and the liquid discharge space 17 contribute to improvement in formability of the engaged body 11.

In the engaged body 10, the engaged protruding portion 12 protrudes from the outer wall surface 14a of the 2 nd engaged wall portion 14. The engaged protrusion 12 of this example is formed in a claw shape having an end surface on the extraction direction side as an engaged surface 12a, and is arranged on the extraction direction side of the outer wall surface 14a of the 2 nd engaged wall portion 14 (fig. 1 to 6). On the 2 nd engaged wall portion 14 in the insertion direction side, 2 cut portions 14b (fig. 1) extending from the end surface on the insertion direction side to the insertion direction side are formed at intervals in the width direction. Each of the cut-out portions 14b is used to form a flexible piece portion 14c (fig. 1, 2, 5, and 6) on the pull-out direction side of the 2 nd engaged wall portion 14. The engaged protrusion 12 is provided on an outer wall surface of the piece 14 c.

In the engaged body 10, the 1 st engaged wall portion 13, the 3 rd engaged wall portion 15, and the 4 th engaged wall portion 16 are extended in the pulling direction side with respect to the 2 nd communication port 17 b.

The engaging body 20 includes: a body (hereinafter, referred to as "engagement body") 21 that accommodates the engaged body 10; and an engaging portion 22 disposed to face the engaged surface 12a of the engaged protrusion 12 accommodated in the engaged body 10 in the insertion/removal direction (fig. 1 to 6).

The engaging body 21 of this example has: a first wall 23 and a 2 nd wall 24 (hereinafter referred to as "1 st engagement wall and 2 nd engagement wall") which are disposed facing each other with a gap therebetween in a direction orthogonal to the insertion/extraction direction; and a 3 rd wall portion 25 and a 4 th wall portion 26 (hereinafter referred to as "3 rd engaging wall portion and 4 th engaged wall portion") which are disposed facing each other with a gap therebetween in a direction (hereinafter referred to as "width direction") orthogonal to the insertion and extraction direction and the facing direction of the 1 st engaging wall portion 23 and the 2 nd engaging wall portion 24 (fig. 1 and 2).

The 1 st engagement wall portion 23 and the 2 nd engagement wall portion 24 in this example are formed in a rectangular flat plate shape. In this example, the 3 rd engagement wall portion 25 is provided as a connection wall portion that connects one end portion in the width direction of the 1 st engagement wall portion 23 and the 2 nd engagement wall portion 24, and the 4 th engagement wall portion 26 is provided as a connection wall portion that connects the other end portion in the width direction of the 1 st engagement wall portion 23 and the 2 nd engagement wall portion 24. That is, the engaging body 21 of this example is formed in a square tube shape by the 1 st to 4 th engaging wall portions 23 to 26. Thus, the engaging body 21 has a rectangular parallelepiped internal space surrounded by the inner wall surfaces of the 1 st to 4 th engaging wall portions 23 to 26. The internal space is used as an accommodating space 27 (fig. 1 to 6) for accommodating the engaged body 11 of the engaged body 10. For example, in the lock structure 1, the engaged body 11 is engaged with the inner wall surface of the housing space 27 in the insertion direction, thereby restricting the insertion amount of the engaged body 11 with respect to the housing space 27.

The engaging body 21 of this example has a tip 11a of the end 11a of the engaged body 11 of the engaged body 10 from the insertion direction side₁The insertion port 27a of the accommodation space 27 is inserted (fig. 1, 2, 5, and 6). The engaging body 21 of this example has a communication port 27b (fig. 1 to 6) that communicates the accommodating space 27 with the outside on the insertion direction side of the insertion port 27 a. In this example, an end portion of the accommodating space 27 on the side of the drawing direction is an insertion port 27a, and an end portion of the accommodating space 27 on the side of the insertion direction is a communication port 27 b. That is, in the engaging body 21, the insertion port 27a and the communication port 27b are arranged to face each other in the insertion/removal direction so that the insertion port 27a opens in the insertion direction and the communication port 27b opens in the insertion direction.

The engaging body 21 of this example is a through hole provided in the 2 nd engaging wall portion 24, and has an engaging hole 24a (fig. 1 to 6) into which the engaged protrusion 12 is inserted when the engaged body 11 of the engaged body 10 is accommodated in the accommodating space 27. The locking hole 24a has at least a peripheral wall surface arranged on the extraction direction side. The peripheral wall surface on the extraction direction side of the locking hole 24a is a locking surface that locks the locked surface 12a of the locked protrusion 12 inserted into the locking hole 24a in the insertion and extraction direction, and is used as the locking portion 22. Thus, the peripheral wall surface on the extraction direction side of the locking hole 24a is formed at a position opposed to the engaged surface 12a of the engaged protrusion 12 after the insertion in the insertion/extraction direction. The peripheral wall surface of the locking hole 24a on the extraction direction side is formed in the following position and shape: the engaged surface 12a of the inserted engaged protrusion 12 is engaged with the engaging body 21 of the engaged body 10 in the pull-out direction, so that the relative movement of the engaged body 11 of the engaged body 10 in the pull-out direction can be restricted. In this example, the locking hole 24a is formed in a rectangular shape, and a peripheral wall surface on one side of the locking hole 24a in the extraction direction is used as the locking portion 22.

In the engaging body 21, a communication hole 27b is disposed on the insertion direction side of the locking hole 24 a. For example, the locking hole 24a and the communication port 27b may be formed as separate through holes and openings by interposing a part of the 2 nd engaging wall portion 24 therebetween, or may be formed without interposing a part of the 2 nd engaging wall portion 24 therebetween. The locking hole 24a in this example is formed as a through hole that communicates with the communication port 27b by extending to the end surface on the insertion direction side of the 2 nd engagement wall portion 24.

In order to insert and remove the engaged body 10 and the engaging body 20, the lock structure 1 is provided with a slight gap between the wall surfaces disposed opposite to each other. Therefore, when there is a gap that continues to the inside of the housing 110 as described later, the lock structure 1 is preferably configured so that a liquid such as water does not enter the inside of the housing 110 through the gap.

For example, in the lock structure 1 of the present embodiment, when the engaged body 11 of the engaged body 10 is accommodated in the engaging body 21 of the engaging body 20, the 1 st communication port 17a of the engaged body 11 and the communication port 27b of the engaging body 21 are connected via the accommodating space 27 therebetween. In the lock structure 1, the engaging hole 24a of the engaging body 21 is also connected to the 1 st communication port 17a via the accommodating space 27 in the accommodated state of the engaged body 11. Therefore, in the case where the connection structure 1 is provided in a state where the liquid may enter the housing space 27 from the communication port 27b, the locking hole 24a, and the like, for example, with the 1 st communication port 17a and the communication port 27b directed upward, the following effects can be obtained.

In the lock structure 1 in this installation state, even if the liquid W enters the housing space 27 from the communication port 27b, the locking hole 24a, or the like, and the liquid W having entered the housing space is guided to the end portion 11a on the insertion direction side of the engaged body 11, the liquid W can be introduced into the liquid discharge space portion 17 from the 1 st communication port 17a and discharged to the outside from the 2 nd communication port 17b (fig. 7). In particular, in the lock structure 1 of this example, since the 1 st communication port 17a is disposed at a position on a straight line with respect to the communication port 27b and the locking hole 24a, the liquid W that has entered the housing space 27 through the communication port 27b and the locking hole 24a can be directly and easily introduced into the liquid discharge space portion 17 through the 1 st communication port 17 a. In this way, since the lock structure 1 of the present embodiment is provided with the drainage space 17 as a drainage space for the liquid W, the liquid W that has entered between the engaged body 10 and the engaging body 20 can be drained to the outside from the drainage space 17. This lock structure 1 can thereby suppress the liquid W from entering the gap between the engaged body 10 and the engaging body 20 connected to the inside of the housing 110.

In the lock structure 1 in this installation state, when the liquid W enters the housing space 27 from the communication port 27b and the locking hole 24a, the liquid W can be discharged to the outside from the gap G1 between the outer wall surface 14a of the 2 nd engaging wall portion 14 of the engaged body 11 and the inner wall surface 24b of the 2 nd engaging wall portion 24 of the engaging body 21 (fig. 7). In this regard, the lock structure 1 can also suppress the liquid W from entering the gap between the engaged body 10 and the engaging body 20 connected to the inside of the housing 110.

In the lock structure 1 in this installation state, even when the liquid W having a high immersion speed is immersed from the insertion port 27a side, the liquid W can be introduced into the liquid discharge space portion 17 from the 2 nd communication port 17b and discharged to the outside from the 1 st communication port 17a (fig. 8). Thus, the lock structure 1 of the present embodiment can discharge the liquid W from the 1 st communication port 17a to the outside even in an installation state where the liquid is likely to enter from the 2 nd communication port 17b, such as when the 2 nd communication port 17b is directed upward. In this regard, the lock structure 1 can also suppress the liquid W from entering the gap between the engaged body 10 and the engaging body 20 connected to the inside of the housing 110.

Here, in the lock structure 1, if the liquid which is not discharged to the outside passes over the tip 11a of the end 11a on the insertion direction side of the engaged body 11₁There is a possibility that the liquid may flow into the outer wall surface 1 of the 1 st wall part to be engaged 13 of the body 11 to be engaged3a and the inner wall surface 23a of the 1 st engagement wall portion 23 of the engagement body 21 (fig. 6). For example, at the front end 11a of the engaged body 11₁In the case where the outside is exposed, the liquid may linearly intrude toward the front end 11a thereof. In a specific application example of the lock structure 1, which will be described later, a gap G2 between the outer wall surface 13a of the 1 st engaged wall portion 13 and the inner wall surface 23a of the 1 st engaging wall portion 23 is continuous with the inside of the housing 110. Therefore, in the lock structure 1, the engagement body 20 is formed as described below, so that the liquid can be prevented from linearly entering toward the distal end 11a of the engaged body 11.

The engaging body 20 has a covering portion 28 that covers an end portion 11a on the insertion direction side of the engaged body 11 accommodated in the accommodating space 27 (fig. 1 to 6). The covering wall portion 28 of this example has: an end 23b (fig. 5 and 6) on the insertion direction side of the 1 st engagement wall 23; a 1 st covering wall 28a (fig. 1 to 6) which is disposed to face the end 23b with a space therebetween and which allows the end 11a of the accommodated engaged body 11 to be present between the 1 st covering wall 28a and the end 23 b; an end 25a (fig. 1 to 4) on the insertion direction side of the 3 rd engaging wall portion 25, the 3 rd engaging wall portion 25 connecting the end 23b and one end in the width direction of the 1 st covering wall portion 28a to each other; an end portion 26a (fig. 1 to 6) on the insertion direction side of the 4 th engagement wall portion 26, the 4 th engagement wall portion 26 connecting the end portion 23b and the other end portion in the width direction of the 1 st covering wall portion 28a to each other; and a 2 nd covering wall portion 28b (fig. 5 and 6) that closes an opening surrounded by the end portions 23b, 25a, and 26a and the front end of the 1 st covering wall portion 28a on the insertion direction side. The 1 st covering wall portion 28a in this example is formed in a rectangular flat plate shape that connects the insertion direction side and the extraction direction side from the communication port 27 b. The second covering wall 28b of this example is formed in a rectangular flat plate shape and faces the front end 11a of the engaged body 11₁Are arranged opposite to each other in the insertion and extraction direction.

In the lock structure 1, the liquid W linearly directed toward the front end 11a of the engaged body 11 can be blocked by the covering portion 28 (fig. 9). Further, in the lock structure 1, for example, since the liquid W is blocked by the cover 28, the liquid W can be suppressed from entering the gap G2 between the outer wall surface 13a of the 1 st engaged wall portion 13 of the engaged body 11 located forward of the distal end 11a and the inner wall surface 23a of the 1 st engaging wall portion 23 of the engaging body 21. In addition, in the lock structure 1, the liquid W blocked by the end 25a of the 3 rd engagement wall 25, the end 26a of the 4 th engagement wall 26, and the 2 nd covering wall 28b can be prevented from entering between the engaged body 10 and the engaging body 20. In the lock structure 1, by disposing the 1 st covering wall portion 28a of the covering portion 28 on the insertion direction side of the 1 st communication port 17a, even if the liquid W blocked by the 1 st covering wall portion 28a enters the housing space 27, the liquid W can be discharged to the outside from the gap G1 between the outer wall surface 14a of the 2 nd engaged wall portion 14 and the inner wall surface 24b of the 2 nd engaging wall portion 24 and the liquid discharge space portion 17 (fig. 9). This lock structure 1 can thereby suppress the liquid W from entering the gap between the engaged body 10 and the engaging body 20 connected to the inside of the housing 110.

The covering portion 28 preferably has a space portion 28d (fig. 6) on the insertion direction side of the front end 11a of the engaged body 11 accommodated in the accommodating space 27. Even if the liquid W that has entered the accommodation space 27 from the locking hole 24a has a high speed of entering and flows to the inner wall surface on the insertion direction side of the 1 st communication port 17a of the 1 st engaged wall 13 and to the leading end 11a of the engaged body 11, the lock structure 1 can suppress the momentum of the liquid W that has passed over the leading end 11a of the engaged body 11 by the space portion 28d (fig. 10). Thus, space 28d is provided in the following shape and volume: when the liquid W passes over the distal end 11a of the engaged body 11 in this manner, the speed of the liquid W is reduced, and the momentum of the liquid W can be suppressed. Thus, even if the liquid W enters the gap G2 between the outer wall surface 13a of the 1 st engaged wall portion 13 and the inner wall surface 23a of the 1 st engaging wall portion 23 from the space portion 28d, the lock structure 1 can reduce the amount of the liquid W entering. Therefore, the lock structure 1 can suppress the liquid W from entering the inside of the housing 110.

In the lock structure 1, the covering portion 28 can suppress the intrusion of the liquid W into the gap G3 (fig. 11) between the outer wall surface 15a of the 3 rd engaged wall portion 15 and the inner wall surface 25b of the 3 rd engaging wall portion 25, and can suppress the intrusion of the liquid W into the gap G4 (fig. 11) between the outer wall surface 16a of the 4 th engaged wall portion 16 and the inner wall surface 26b of the 4 th engaging wall portion 26.

In addition, the lock structure 1 is preferably provided with a labyrinth structure in which the amount of liquid entering the gap between the engaged body 10 and the engaged body 20 connected to the inside of the housing 110 is reduced.

The engaged body 10 includes: a 1 st protruding wall portion 18a that intersects the outer wall surface 15a of the 3 rd engaged wall portion 15, protrudes from the outer wall surface 15a, and extends in the insertion/removal direction; and a 2 nd projecting wall portion 18b that intersects the outer wall surface 16a of the 4 th engaged wall portion 16, projects from the outer wall surface 16a, and extends in the insertion and extraction direction (fig. 2 and 11). The 1 st projecting wall portion 18a in this example projects from the 1 st engaging wall portion 23 side of the outer wall surface 15a of the 3 rd engaged wall portion 15 in a direction orthogonal to the outer wall surface 15 a. The 2 nd projecting wall portion 18b in this example projects from the 1 st engaging wall portion 23 side of the outer wall surface 16a of the 4 th engaged wall portion 16 in the direction orthogonal to the outer wall surface 16 a. The 1 st projecting wall portion 18a and the 2 nd projecting wall portion 18b project in opposite directions to each other in the width direction on the same plane as the 1 st engaged wall portion 13.

The 3 rd engaging wall portion 25 of the engaging body 21 has a groove portion 25c (fig. 11) for accommodating the 1 st protruding wall portion 18a of the engaged body 10. The 4 th engagement wall 26 of the engagement body 21 has a groove 26c (fig. 5 and 11) for accommodating the 2 nd projecting wall 18b of the engaged body 10. The groove portion 25c of this example is provided on the inner wall surface 25b of the 3 rd engagement wall portion 25. The groove 26c in this example is provided on the inner wall surface 26b of the 4 th engagement wall 26.

In this lock structure 1, a gap G5 (fig. 11) is formed between the 1 st projecting wall portion 18a and the groove portion 25 c. The gap G3 between the outer wall surface 15a of the 3 rd engaged wall portion 15 and the inner wall surface 25b of the 3 rd engaging wall portion 25 is continuous with the gap G2 between the outer wall surface 13a of the 1 st engaged wall portion 13 and the inner wall surface 23a of the 1 st engaging wall portion 23 via the gap G5 (fig. 11). Thus, in the lock structure 1, the gap G3 or G5 forms a labyrinth structure, so that the liquid W can be prevented from entering the gap G2. Even if the liquid W enters the gap G3 and reaches the gap G2, the liquid W entering the gap G3 passes through the gap G5 and reaches the gap G2, so that the amount of the liquid W reaching the gap G2 can be reduced. Further, in the lock structure 1 of this example, one end in the width direction of the gap G2 can be shared as a part of the gap G5.

In addition, in this lock structure 1, a gap G6 (fig. 11) is formed between the 2 nd projecting wall portion 18b and the groove portion 26 c. The gap G4 between the outer wall surface 16a of the 4 th engaged wall portion 16 and the inner wall surface 26b of the 4 th engaging wall portion 26 is continuous with the gap G2 through the gap G6 (fig. 11). Thus, in the lock structure 1, the gap G4 or G6 forms a labyrinth structure, so that the liquid W can be prevented from entering the gap G2. Even if the liquid W enters the gap G4 and reaches the gap G2, the liquid W entering the gap G4 passes through the gap G6 and reaches the gap G2, so that the amount of the liquid W reaching the gap G2 can be reduced. Further, in the lock structure 1 of this example, the other end portion in the width direction of the gap G2 can be commonly used as a part of the gap G6.

Therefore, the lock structure 1 can suppress the liquid W from entering the inside of the housing 110 by the labyrinth structure.

In the lock structure 1, the combination of the 1 st projecting wall portion 18a and the groove portion 25c and the combination of the 2 nd projecting wall portion 18b and the groove portion 26c can also function as a guide mechanism when the engaged body 11 is inserted into the housing space 27.

Incidentally, the 2 nd engagement wall portion 24 of the engagement body 21 has one edge portion 24c in the width direction of the locking hole 24a and the other edge portion 24d in the width direction of the locking hole 24a (fig. 1 to 4 and 11). One edge portion 24c is a portion where the 2 nd engaging wall portion 24 and the 3 rd engaging wall portion 25 are connected, and is arranged orthogonal to the 3 rd engaging wall portion 25. An inner wall surface 24c of the one edge portion 24c₁Is disposed to face one end in the width direction of the outer wall surface 14a of the 2 nd engaged wall portion 14 (fig. 11). That is, in the lock structure 1 of this example, one end in the width direction of the outer wall surface 14a of the 2 nd engaged wall portion 14 and the inner wall surface 24c of one edge portion 24c are passed through₁Gap G7 between, gap G3 is connected to the outside. Thus, in the lock structure 1, the gaps G7, G3, and G5 form a labyrinth structure, and therefore, the lock structure can be further improvedThe liquid W is further suppressed from entering the gap G2, and even if the liquid reaches the gap G2, the liquid passes through the gaps G7, G3, and G5 and then reaches the gap G2, so that the amount of the liquid reaching the gap G2 can be further reduced. The other edge portion 24d is a portion where the 2 nd engagement wall portion 24 and the 4 th engagement wall portion 26 are connected, and is disposed orthogonal to the 4 th engagement wall portion 26. An inner wall surface 24d of the other edge 24d₁and the other end in the width direction of the outer wall surface 14a of the 2 nd engaged wall portion 14 (fig. 11). That is, in the lock structure 1 of this example, the other end in the width direction of the outer wall surface 14a of the 2 nd engaged wall portion 14 and the inner wall surface 24d of the other edge portion 24d are passed through₁Gap G8 between, gap G4 is connected to the outside. Thus, in the lock structure 1, since the labyrinth structure is formed by the gaps G8, G4, and G6, the liquid W can be further prevented from entering the gap G2, and even if the liquid reaches the gap G2, the liquid passes through the gaps G8, G4, and G6 and then reaches the gap G2, so that the amount of the liquid reaching the gap G2 can be further reduced. Thus, the lock structure 1 of this example can further suppress the liquid W from entering the inside of the housing 110.

The locking structure 1 also has a labyrinth structure as follows.

The engaged body 10 has a 1 st extending wall portion 13b, and the 1 st extending wall portion 13b extends to protrude in the pull-out direction from the engaged body 11, and is disposed to face the inner wall surface 23a of the 1 st engaging wall portion 23 after being accommodated in the accommodating space 27 of the engaged body 11 (fig. 12). In this example, the 1 st engagement wall portion 13 is extended in the pull-out direction, and the extended portion thereof is used as the 1 st extended wall portion 13 b. Thus, in the lock structure 1 of this example, the gap G2 between the outer wall surface 13a of the 1 st engaged wall portion 13 and the inner wall surface 23a of the 1 st engaging wall portion 23 is connected to the 1 st extending wall portion 13 b.

The engaged body 10 has a 2 nd extending wall portion 15b, and the 2 nd extending wall portion 15b extends to protrude in the pull-out direction from the engaged body 11, and is disposed to face the inner wall surface 25b of the 3 rd engaging wall portion 25 after the engaged body 11 is accommodated in the accommodating space 27 (fig. 12). The 2 nd extending wall portion 15b is provided in a rib-like structure vertically on the inner wall surface of the 1 st extending wall portion 13 b. In this example, the 3 rd engaging wall portion 15 is extended in the pull-out direction, and the extended portion thereof is used as the 2 nd extending wall portion 15 b. Thus, in the lock structure 1 of this example, the gap G3 between the outer wall surface 15a of the 3 rd engaged wall portion 15 and the inner wall surface 25b of the 3 rd engaging wall portion 25 is connected to the 2 nd extending wall portion 15 b.

The 2 nd extending wall 15b is provided vertically from the inner wall surface of the 1 st extending wall 13b to the position of the outer wall surface 14a of the 2 nd engaged wall 14, and has its end surface on the vertical direction side and the inner wall surface 24c of the one edge 24c of the 2 nd engaging wall 24₁Are arranged oppositely. Thus, in the lock structure 1 of this example, one end in the width direction of the outer wall surface 14a of the 2 nd engaged wall portion 14 and the inner wall surface 24c of the one edge portion 24c₁the gap G7 therebetween is connected to the 2 nd extending wall portion 15 b.

In the lock structure 1, since the labyrinth structure is formed by the gaps G3 and G7 of the 2 nd extending wall portion 15b, the liquid W can be suppressed from entering the gap G2.

Here, the 1 st projecting wall portion 18a of this example extends in the insertion/removal direction up to the 2 nd extending wall portion 15b (fig. 12). Thus, the liquid W that enters the gap G3 of the 2 nd extending wall portion 15b must pass over the 1 st protruding wall portion 18a to reach the gap G2. That is, in the lock structure 1, since the creepage distance is increased by the 1 st projecting wall portion 18a extending to the 2 nd extending wall portion 15b, even if the liquid W enters the gap G3 of the 2 nd extending wall portion 15b and reaches the gap G2, the amount of the liquid W reaching the gap G2 can be reduced. In the lock structure 1, the groove portion 25c is extended so as to accommodate the 1 st projecting wall portion 18a at the position of the 2 nd extending wall portion 15 b.

The engaged body 10 has a 3 rd extending wall portion 16b, and the 3 rd extending wall portion 16b extends to protrude in the pull-out direction from the engaged body 11, and is disposed to face the inner wall surface 26b of the 4 th engaging wall portion 26 after the engaged body 11 is accommodated in the accommodating space 27 (fig. 12). The 3 rd extending wall portion 16b is provided in a rib-like structure vertically on the inner wall surface of the 1 st extending wall portion 13 b. In this example, the 4 th engaged wall portion 16 is extended in the pull-out direction, and the extended portion thereof is used as the 3 rd extended wall portion 16 b. Thus, in the lock structure 1 of this example, the gap G4 between the outer wall surface 16a of the 4 th engaged wall portion 16 and the inner wall surface 26b of the 4 th engaging wall portion 26 is connected to the 3 rd extending wall portion 16 b.

The 3 rd extending wall 16b is vertically provided from the inner wall surface of the 1 st extending wall 13b to the outer wall surface 14a of the 2 nd engaged wall 14, and has its end surface on the vertical direction side and the inner wall surface 24d of the other edge 24d of the 2 nd engaging wall 24₁are arranged oppositely. Thus, in the lock structure 1 of this example, the other end in the width direction of the outer wall surface 14a of the 2 nd engaged wall portion 14 and the inner wall surface 24d of the other edge portion 24d₁The gap G8 therebetween is connected to the 3 rd extending wall portion 16 b.

Thus, in the lock structure 1, the gap G4, G8 of the 3 rd extending wall portion 16b forms a labyrinth structure, so that the liquid W can be prevented from entering the gap G2.

Here, the 2 nd projecting portion 18b of this example extends up to the 3 rd extending wall portion 16b in the inserting and extracting direction (fig. 12). Thus, the liquid W that has entered the gap G4 of the 3 rd extending wall portion 16b must pass over the 2 nd projecting wall portion 18b to reach the gap G2. That is, in the lock structure 1, since the creepage distance is increased by the 2 nd projecting wall portion 18b extending to the 3 rd extending wall portion 16b, even if the liquid W enters the gap G4 of the 3 rd extending wall portion 16b and reaches the gap G2, the amount of the liquid W reaching the gap G2 can be reduced. In the lock structure 1, the groove portion 26c is extended so as to accommodate the 2 nd projecting wall portion 18b at the position of the 3 rd extending wall portion 16 b.

Further, in the engaging body 21 of this example, a rib-shaped protruding portion 29a is provided at one end in the width direction of the inner wall surface 23a of the 1 st engaging wall portion 23, and the protruding portion 29a protrudes from the inner wall surface 23a toward the outer wall surface 13a of the 1 st engaged portion 13 and extends in the insertion and extraction direction (fig. 11). In the engaging body 21 of this example, a rib-like projecting portion 29b is provided at the other end in the width direction of the inner wall surface 23a of the 1 st engaging wall portion 23, and the projecting portion 29a projects from the inner wall surface 23a toward the outer wall surface 13a of the 1 st engaged portion 13 and extends in the insertion and extraction direction (fig. 5 to 11). The projections 29a and 29b are formed in a range substantially equal to the locking hole 24a in the insertion and extraction direction. Here, the protrusion 29a is disposed at the boundary portion between the gap G4 and the gap G2, and the protrusion 29b is disposed at the boundary portion between the gap G6 and the gap G2. Thus, in the lock structure 1, the respective protrusions 29a, 29b also act as one end of the labyrinth structure. Therefore, in the lock structure 1, the liquid W can be further prevented from entering the gap G2, and even if the liquid reaches the gap G2, the amount of the liquid reaching the gap G2 can be further reduced, so that the liquid W can be further prevented from entering the inside of the housing 110. The respective protrusions 29a and 29b have an effect of being a guide portion when the engaged body 11 is inserted into the accommodating space 27, and also have an effect of suppressing mutual play after the engaged body 11 is accommodated in the accommodating space 27.

As described above, the lock structure 1 of the present embodiment can suppress the liquid from entering the gap between the engaged body 10 and the engaging body 20 connected to the inside of the housing 110, and can suppress the liquid W from entering the gap G2 directly connected to the inside of the housing 110 or reduce the amount of the liquid W entering G2 even if the liquid enters the gap, so that the liquid W can be suppressed from entering the inside of the housing 110.

The lock structure 1 can be applied to, for example, an electrical connection box that houses an electronic component and an electric wire and constitutes a wire harness together with the electric wire pulled out to the outside, and the like. Here, the lock structure 1 applied to the electrical connection box 100 (fig. 13) constituting the wire harness WH is shown.

The electrical connection box 100 includes a housing 110 that accommodates electronic components (not shown) therein. In the housing 110 of this example, a wire We electrically connected to the electronic component inside is also housed, and the wire We is pulled out from inside to outside (fig. 13). The electrical connection box 100 electrically connects an object to be connected (not shown) to an electronic component via an electric wire We. In the electrical connection box 100, the electronic component is electrically connected to the connection object via the electric wire We drawn out from the inside of the housing 110.

The electronic component refers to, for example, a circuit protection component such as a relay or a fuse, a connector, a terminal fitting, or the like. Here, as one of the electronic components, an electronic device such as a circuit board and an electronic control unit (so-called ECU) is considered. The connection object is a device such as a power source such as a rechargeable battery, a load such as an electrical device (an actuator, etc.), or a sensor. In the electrical junction box 100, for example, a certain electric wire We is electrically connected to a power source, and another electric wire We different from the certain electric wire We is electrically connected to a load, so that the power source and the load are electrically connected via electronic components.

The frame 110 is molded from an insulating material such as synthetic resin. The housing 110 has at least a 1 st fitting member 120 and a 2 nd fitting member 130 (fig. 13 to 15) fitted to each other. The housing 110 of this example further includes a 3 rd fitting member 140 (fig. 13 to 15). In the housing 110, the 1 st fitting member 120, the 2 nd fitting member 130, and the 3 rd fitting member 140 are arranged in this order. The housing 110 is formed by fitting the 1 st fitting member 120 and the 2 nd fitting member 130, and fitting the 2 nd fitting member 130 and the 3 rd fitting member 140.

In the housing 110 of this example, the 2 nd fitting member 130 in the middle is formed in a cylindrical shape, the opening on one side of the 2 nd fitting member 130 is closed by the 1 st fitting member 120, and the opening on the other side of the 2 nd fitting member 130 is closed by the 3 rd fitting member 140. Here, the 2 nd fitting member 130 is a frame as a main body of the housing 110, and the 1 st fitting member 120 and the 3 rd fitting member 140 are cover members for closing an opening of the 2 nd fitting member 130. The housing 110 is mounted on the vehicle with 2 openings of the 2 nd fitting member 130 disposed to face each other, for example, in the vehicle vertical direction. Either one of the 1 st fitting part 120 and the 3 rd fitting part 140 may be a lower cover or an upper cover. Here, for convenience, the 1 st fitting member 120 is a lower cover, and the 3 rd fitting member 140 is an upper cover.

The 2 nd fitting member 130 has a cylindrical 1 st peripheral wall 131 constituting an inner wall and a cylindrical 2 nd peripheral wall 132 constituting an outer wall (fig. 14 and 15). The 1 st and 2 nd circumferential wall bodies 131 and 132 are members formed by connecting a plurality of plate-like wall bodies of the same number in a circumferential direction. The 2 nd fitting member 130 is a two-layer wall structure in which the 1 st circumferential wall 131 and the 2 nd circumferential wall 132 are arranged so as to be aligned in the same direction in the axial direction of the cylinder, and the 1 st circumferential wall 131 and the 2 nd circumferential wall 132 are arranged to face each other with a space therebetween. Therefore, in the 2 nd fitting member 130, a cylindrical space (hereinafter referred to as "cylindrical space") 133 (fig. 14 and 15) is formed between the 1 st circumferential wall 131 and the 2 nd circumferential wall 132. In addition, in the 2 nd fitting member 130, 1 or more housing chambers are formed inside the 1 st peripheral wall body 131, and the electronic component and the electric wire We are housed in the housing chambers.

The 1 st circumferential wall 131 has 2 openings 131a and 131b (fig. 14 and 15) arranged to face each other. The 2 nd peripheral wall 132 has 2 openings 132a and 132b (fig. 14 and 15) disposed to face each other. In the 2 nd fitting member 130, a peripheral edge portion (hereinafter referred to as "opening peripheral edge portion") 131c of the one opening 131a of the 1 st peripheral wall 131 and a peripheral edge portion (hereinafter referred to as "closed peripheral edge portion") 132c of the one opening 132a of the 2 nd peripheral wall 132 are arranged to face each other with a space therebetween (fig. 15). Therefore, in the 2 nd fitting member 130, the annular opening 134 between the one opening 131a of the 1 st peripheral wall 131 and the respective one opening peripheral edges 131c, 132c serves as an opening to be closed by the 1 st fitting member 120 (fig. 15). In the 2 nd fitting member 130, a peripheral edge portion (hereinafter referred to as "opening peripheral edge portion") 131d of the other opening 131b of the 1 st peripheral wall 131 and a peripheral edge portion (hereinafter referred to as "opening peripheral edge portion") 132d of the other opening 132b of the 2 nd peripheral wall 132 are arranged to face each other with a space therebetween (fig. 14). Therefore, in the 2 nd fitting member 130, the annular opening 135 between the other opening 131b of the 1 st peripheral wall 131 and the respective other opening peripheral edges 131d, 132d is an opening to be closed by the 3 rd fitting member 140 (fig. 14).

the 1 st fitting member 120 includes a cylindrical peripheral wall 121 and a closing member 122 (fig. 14 and 15) closing one opening of the peripheral wall 121. Here, the other opening of the peripheral wall portion 121 is used as the opening 120a of the 1 st fitting member 120 (fig. 14). In the peripheral wall 121, a plurality of flat plate-like wall bodies arranged in series in the circumferential direction are arranged corresponding to the plurality of flat plate-like wall bodies of the 1 st peripheral wall 131 and the 2 nd peripheral wall 132. Thus, in the 1 st fitting member 120, the peripheral edge portion 121a (hereinafter referred to as "opening peripheral edge portion") 121a of the opening 120a of the peripheral wall body 121 (fig. 14) can be inserted and fitted into the cylindrical space portion 133 from the opening 134 of the 2 nd fitting member 130. With this insertion fitting, the opening peripheral edge portion 121a is sandwiched between the one opening peripheral edge portion 131c of the 1 st peripheral wall 131 and the one opening peripheral edge portion 132c of the 2 nd peripheral wall 132 of the 2 nd fitting member 130. In the 1 st fitting member 120 and the 2 nd fitting member 130, in the fitted state, the inner wall surface of the opening peripheral edge portion 121a of the peripheral wall body 121 and the outer wall surface of the one opening peripheral edge portion 131c of the 1 st peripheral wall body 131 are arranged to face each other, and the outer wall surface of the opening peripheral edge portion 121a of the peripheral wall body 121 and the inner wall surface of the one opening peripheral edge portion 132c of the 2 nd peripheral wall body 132 are arranged to face each other.

The 3 rd fitting member 140 includes a cylindrical peripheral wall 141 and a closing body 142 (fig. 14 and 15) for closing one opening of the peripheral wall 141. Here, the other opening of the peripheral wall portion 141 is used as the opening 140a of the 3 rd fitting member 140 (fig. 15). In the peripheral wall 141, a plurality of flat plate-like walls arranged in series in the circumferential direction are arranged corresponding to the plurality of flat plate-like walls of the 1 st peripheral wall 131 and the 2 nd peripheral wall 132. Thus, in the 3 rd fitting member 140, a peripheral edge portion (hereinafter referred to as "opening peripheral edge portion") 141a (fig. 15) of the opening 140a of the peripheral wall body 141 can be inserted and fitted into the cylindrical space portion 133 from the opening 135 of the 2 nd fitting member 130. With this insertion fitting, the opening peripheral edge portion 141a is sandwiched between the other opening peripheral edge portion 131d of the 1 st peripheral wall 131 and the other opening peripheral edge portion 132d of the 2 nd peripheral wall 132 of the 2 nd fitting member 130. In the 3 rd fitting member 140 and the 2 nd fitting member 130, in the fitted state, the inner wall surface of the opening peripheral portion 141a of the peripheral wall body 141 and the outer wall surface of the other opening peripheral portion 131d of the 1 st peripheral wall body 131 are arranged to face each other, and the outer wall surface of the opening peripheral portion 141a of the peripheral wall body 141 and the inner wall surface of the other opening peripheral portion 132d of the 2 nd peripheral wall body 132 are arranged to face each other.

The housing 110 has a 1 st locking structure 150 for maintaining the fitting state of the 1 st fitting member 120 and the 2 nd fitting member 130, and a 2 nd locking structure 160 for maintaining the fitting state of the 2 nd fitting member 130 and the 3 rd fitting member 140 (fig. 13 to 15).

Here, the previously illustrated lock structure 1 is applied to the 1 st lock structure 150. In the 1 st lock structure 150 (lock structure 1), the engaged body 10 is provided in the 1 st fitting member 120, and the engaging body 20 is provided in the 2 nd fitting member 130.

The engaged body 10 is provided on the outer wall surface side of the peripheral wall 121 of the 1 st fitting member 20 (fig. 14 and 15). In the 1 st fitting member 120 of this example, the engaged bodies 10 are provided at 4 positions on the outer wall surface side of the peripheral wall body 121.

Specifically, the engaged body 10 forms the 1 st engaged wall portion 13 by a part of the peripheral wall 121 of the 1 st fitting member 120 (fig. 14). Thus, the outer wall surface 13a of the 1 st engaged wall portion 13 is disposed on the same plane as the inner wall surface of the peripheral wall body 121. The engaged body 10 is provided on the opening peripheral edge 121a of the peripheral wall 121. In the engaged body 10, all or a part of the 1 st engaged wall portion 13 protrudes in the insertion direction of the engaging body 20 from the end surface of the opening peripheral edge portion 121a of the peripheral wall body 121, and at least the end portion 11a of the engaged body 11 and the 1 st communication port 17a are arranged on the insertion direction side of the engaging body 20 from the end surface of the opening peripheral edge portion 121 a. In the engaged body 10 of this example, the engaged protrusion 12 and the drainage space 17 are arranged on the insertion direction side of the engaging body 20 with respect to the end surface of the opening peripheral edge 121 a.

The engaging body 20 is provided on the 1 st and 2 nd peripheral walls 131 and 132 of the 2 nd fitting member 130 (fig. 14 and 15). In the 2 nd fitting member 130 of this example, the fitting body 20 is provided at 4 positions of the 1 st circumferential wall 131 and the 2 nd circumferential wall 132 which are disposed to face each other.

Specifically, in the engaging body 20, the 1 st engaging wall portion 23 is formed by a part of the 1 st peripheral wall portion 131, and the 2 nd engaging wall portion 23 is formed by a part of the 2 nd peripheral wall portion 132 (fig. 15). Thus, the inner wall surface 23a of the 1 st engagement wall portion 23 is arranged on the same plane as the outer wall surface of the 1 st circumferential wall portion 131. In contrast, the 2 nd engaging wall portion 24 of this example is disposed on the 2 nd peripheral wall portion 132 so as to protrude toward the opposite side of the 1 st peripheral wall portion 131. Similarly, the 1 st covering wall 28a of this example is disposed on the 2 nd peripheral wall 132 so as to protrude toward the opposite side of the 1 st peripheral wall 131. The engaging body 20 is provided between the opening peripheral edge 131c of the 1 st peripheral wall 131 and the opening peripheral edge 132c of the 2 nd peripheral wall 132. The engaging body 20 is disposed at a position not protruding from the end faces of the opening peripheral edges 131c, 132 c. In the 2 nd fitting member 130, the 3 rd engagement wall portion 25, the 4 th engagement wall portion 26, and the 2 nd covering wall portion 28b are provided as connection wall portions that connect the 1 st peripheral wall portion 131 and the 2 nd peripheral wall portion 132.

In this housing 110, since the 1 st locking structure 150 (locking structure 1) is provided in this manner, the gap G2 between the outer wall surface 13a of the 1 st engaged wall portion 13 and the inner wall surface 23a of the 1 st engaging wall portion 23 is formed as a part of the gap between the inner wall surface of the peripheral wall body 121 and the outer wall surface of the 1 st peripheral wall body 131. Therefore, in the frame body 110, the gap G2 is connected to the internal accommodation chamber. However, as described above, the 1 st lock structure 150 (lock structure 1) can suppress the liquid W from entering the gap between the engaged body 10 and the engaging body 20 connected to the housing space inside the housing 110, and can suppress the liquid W from entering the gap G2 directly connected to the housing chamber or reduce the amount of the liquid W entering the gap G2 even if the liquid W enters the gap. This allows the housing 110 to prevent the liquid W from entering the internal storage chamber.

In the housing 110, the 1 st protruding wall portion 18a and the 2 nd protruding wall portion 18b of the engaged body 10 are connected to the opening peripheral edge portions 121a of the peripheral walls 121. Therefore, the frame body 110 can suppress the liquid W from entering the gap between the inner wall surface of the peripheral wall body 121 and the outer wall surface of the 1 st peripheral wall body 131 around the engaged body 10.

The engaged body 10 of this example connects the 1 st protruding wall portion 18a and the 2 nd protruding wall portion 18b to the opening peripheral edge portion 121a of the peripheral wall body 121 on the same plane. A rib-like projection 123 is provided on the outer wall surface of the opening peripheral edge 121 a. The opening peripheral edge portion 121a is provided with a protruding portion 123 at a position other than the arrangement position of the engaged members, and the protruding portion 123 is connected to the 3 rd engaged wall portion 15 and the 4 th engaged wall portion 16 in an orthogonal state. Thus, in the housing 110, a labyrinth structure formed by the opening peripheral edge 121a of the peripheral wall body 121, the protruding portion 123, and the one opening peripheral edge 131c of the 1 st peripheral wall body 131 is also formed around the lock structure 150 (lock structure 1). Therefore, in this respect, the housing 110 can also suppress the liquid W from entering the internal storage chamber.

In addition, the 2 nd locking structure 160 may be the same as the 1 st locking structure 150, the locking structure 1 may be applied, and a structure different from the locking structure 1 may be used. The 2 nd lock structure 160 of this example includes: a engaged body 161 provided in the 3 rd fitting member 140; and an engaging body 162 provided on the 2 nd fitting member 130, the engaged body 161 being insertable and removable in opposite insertion and removal directions, and the engaged body 161 inserted being engageable and disengageable in the insertion direction and the removal direction (fig. 13 to 15). The 2 nd locking structure 160 is formed to engage the engaged body 161 and the engaging body 162 by, for example, hooking respective claw portions of the engaged body 161 and the engaging body 162 to each other when the 2 nd fitting member 130 and the 3 rd fitting member 140 are in the fitted state, and to engage the engaged body 161 and the engaging body 162 with each other by relative movement in the pulling-out direction. In addition, when the 2 nd fitting member 130 and the 3 rd fitting member 140 are fitted to each other, the 2 nd locking structure 160 is formed to engage the engaged body 161 and the engaging body 162 so that the engaged body 161 cannot be further inserted into the engaging body 162, for example, and thereby to engage the engaged body 161 and the engaging body 162 with each other by relative movement in the insertion direction.

As described above, the lock structure 1, the electrical connection box 100, and the wire harness WH according to the present embodiment can prevent the liquid W from entering the housing chamber inside the housing 110. Therefore, the lock structure 1, the electrical connection box 100, and the wire harness WH can suppress performance degradation due to the intrusion of the liquid W with respect to the electronic components and the like stored in the storage chamber, and therefore can improve durability.

Claims

1. A lock structure is characterized by comprising:

A stuck body; and

A engaging body capable of inserting and removing the engaged body in mutually opposite inserting and removing directions and engaging the inserted engaged body in the inserting direction and the removing direction,

The engaged body has: a 1 st wall to be engaged and a 2 nd wall to be engaged, the 1 st wall to be engaged and the 2 nd wall to be engaged being disposed opposite to each other with a gap therebetween in a direction orthogonal to the insertion and extraction direction; a 3 rd engaged wall portion and a 4 th engaged wall portion, the 3 rd engaged wall portion and the 4 th engaged wall portion being disposed to face each other with a gap therebetween in a direction orthogonal to the insertion/removal direction and a facing direction of the 1 st engaged wall portion and the 2 nd engaged wall portion; a liquid discharge space portion surrounded by inner wall surfaces of the 1 st to 4 th engaged wall portions; an engaged protruding portion protruding from an outer wall surface of the 2 nd engaged wall portion; a 1 st communication port that communicates the liquid discharge space portion with the outside on the insertion direction side with respect to the engagement protruding portion; and a 2 nd communication port which communicates the liquid discharge space portion with the outside on the side of the 1 st communication port in the extraction direction,

The card assembly has: a 1 st engaging wall portion and a 2 nd engaging wall portion, the 1 st engaging wall portion and the 2 nd engaging wall portion being disposed opposite to each other with a gap therebetween in the opposing direction; a 3 rd engaging wall portion and a 4 th engaging wall portion, the 3 rd engaging wall portion and the 4 th engaging wall portion being disposed to face each other with a gap therebetween in a direction orthogonal to the insertion/removal direction and the facing direction; an accommodating space which is an internal space surrounded by the inner wall surfaces of the 1 st to 4 th engaging wall portions and accommodates the engaged member; an insertion opening through which the engaged body is inserted into the accommodating space from a front end of an end portion on the insertion direction side; a locking hole which is a through hole provided in the 2 nd engaging wall portion and into which the engaged protrusion is inserted when the engaged body is accommodated in the accommodating space; and a communication port that communicates the accommodation space with the outside on the insertion direction side of the locking hole.

2. The lock structure according to claim 1, wherein the locking hole is a through hole continuous to the communication port.

3. The lock structure according to claim 1 or 2, wherein the 1 st communication port and the 2 nd communication port are arranged to be opposed to each other in the insertion and extraction direction.

4. The locking structure of claim 1, 2 or 3,

The engaged body is provided on an outer wall surface side of a peripheral wall body of the 1 st fitting member, and the 1 st engaged wall portion is formed by a part of the peripheral wall body of the 1 st fitting member,

The engaging body is provided on a 1 st peripheral wall body and a 2 nd peripheral wall body of a 2 nd fitting member that sandwich an opening peripheral edge portion of the peripheral wall body of the 1 st fitting member, and the 1 st engaging wall portion is formed by a part of the 1 st peripheral wall body having an opening peripheral edge portion that is disposed to face an inner wall surface of the opening peripheral edge portion of the peripheral wall body, and the 2 nd engaging wall portion is formed by a part of the 2 nd peripheral wall body having an opening peripheral edge portion that is disposed to face an outer wall surface of the opening peripheral edge portion of the peripheral wall body.

5. An electrical connection box, characterized in that,

Includes a frame for accommodating electronic components therein,

The frame body has at least a 1 st fitting part and a 2 nd fitting part which are fitted to each other, and has a locking structure which maintains a fitting state of the 1 st fitting part and the 2 nd fitting part,

The lock structure includes: an engaged body provided in the 1 st fitting member; and a engaging body provided on the 2 nd fitting member, the engaging body being capable of inserting and removing the engaged body in mutually opposite insertion and removal directions, and of engaging the inserted engaged body in the insertion direction and the removal direction,

The engaged body has: a 1 st wall to be engaged and a 2 nd wall to be engaged, the 1 st wall to be engaged and the 2 nd wall to be engaged being disposed opposite to each other with a gap therebetween in a direction orthogonal to the insertion and extraction direction; a 3 rd engaged wall portion and a 4 th engaged wall portion, the 3 rd engaged wall portion and the 4 th engaged wall portion being disposed to face each other with a gap therebetween in a direction orthogonal to the insertion/removal direction and a facing direction of the 1 st engaged wall portion and the 2 nd engaged wall portion; a liquid discharge space portion surrounded by inner wall surfaces of the 1 st to 4 th engaging wall portions; an engaged protruding portion protruding from an outer wall surface of the 2 nd engaged wall portion; a 1 st communication port that communicates the liquid discharge space portion with the outside on the insertion direction side with respect to the engagement protruding portion; and a 2 nd communication port which communicates the liquid discharge space portion with the outside on the side of the 1 st communication port in the extraction direction,

6. A wire harness, characterized in that,

the disclosed device is provided with:

an electronic component;

An electric wire electrically connected with respect to the electronic component; and

A frame body that houses the electronic component and the electric wire inside and that pulls out the electric wire from inside to outside,